Sand-cutting mechanism



May 8, 1929- H. 1.. wADswoR'm SAND CUTTING MECHANISM Filed Aug. 1923 h. t .m Wm mw L m 0 d/ Y Patentecl May 28, 1929. I,

- um re n ST .nownnn nfiwrrnswosrn, or crinvnnnni), OHIO.

' SAND-CUTTINGIMECHANISM. I

Application filed August 9, 1923: Serial No. 656,493;

The present invention relates as indicated to san'd cutt'mg apparatusand refers more particularly to an improved apparatus tor cutting, mixing and aerating the mold sandused in foundries. Oneof thepri'ncipal objects of the invention isito providein a unitary structure anapparatus which'may be conveniently mounte d'beneath the floor level of a'foundry and'whichis adaptedto receive sand from the'molds andto'cut-and aerate such sand and to then. convey the cut sand back to the place of molding or togconvenient storage bins. The present" apparaclosedmeans-constituting;however,' but one of various mechanical "for-ms in -which the principle ofthe invention may'be'used.

In said annexed drawing: Fig. '1' is a longitudinal sectional view through one embodiment of my invention;

Fig. 2 is a similarview showing another embodiment thereof; and Fig.93'1s aitransverse sectional View astaken online' 3 3, in Fig.

1,-the cutting; cylinder and itsframe being shown in elevation.

The present novel apparatus is particular- 'ly' designed for usei n connection with automatic sand handling and preparing systems and may be .ad d cd to existing installations, or maybe built in as part of new systems. My apparatus, taken as awhole, consists of a stationary sand cutting "and distributing unit which may be mounted] to meet individual conditions, therebeing shown in the'accompanying drawing only two of the many possib-le installations of.the present. apparatus. A single unit may be so installedas to handle all of the sand for an entire foundry, in which case suitable means are provided for conveying the sand to and away from the cutting and mixing device. It has been found very desirable, due to the limited floor space in most foundries and on account of the objectionable dust resulting from the sand mixing operation, to mount such mixing apparatus in an enclosed casing beneath-1 thefloor line.

The cutting and mixing mechanism'maybe mounted in connection with a''hopperor chute into which the sand to betreate'di's ply of used: sand is kept.

Referring now to Fi-g. 1, thefloor is indicated by "numeral 10 in which is 5 provided an opening '11 leading to a chute'or hopper 12. A screen 13In'ay'be placed across/this opening to separate coarse objects from. the sand as 1t'1s dumpedorshoveled intothe hopper. The hopper 112" and" the sand cut;

ting and conveying"device to be'presently described' may befixedly mounted" in any desired'manner, the same being'herein shown as carried .by-a' unitarydrameworkl' l composed of angle irons and'girders. "Mounted at the bottom of the hopperis a rotating sand" cutting and mixingcylin fder. 15, which extends transversely across the outlet mouth of sai'dfhopper. The cutting cylinder is preferably in'theformof a skeleton like cylinder 50, on wliichare carried" spiral blades .'1 6;.the structure being fixe'd'to and carriedj by .a'rotati'ng shaft 17 Power may be transmitted to shaft 1'7 through achain 18, reduction gear box 19"; and motor '20, it being understood, however, that: the same .power for controlling the conveyingel'ements may beutilizedif desired to rotate the cutting cylinder. As seen from aninspection of such figure, the sand contained in the hopper 12fallsby gravity against one side of .60 I dumped orzmaybearrangedin connection w th a storage" hopper 1n 'WlllCll a great sup- "the cutting cylinder, which acts upon such v sandto cut and mixit. The cuttingaction of the cylinder ten'dsito'kick'orthrowthe cut sand away'therefromin a 'direction opposite from the hopper 12'. An. enclosed casing 01' compartment 21 is providettto 'confin'e'the san d as itis 'thrown from the .cutting cylinder and a second chute orthopper 22' may be. provided I beneath the compartment 21', intojwhich the'mixe'd sand may,

fall. F'rom this hopper QQ'th'etreatedJ sand maybe then conveyed back to the lace of molding or to suitablestoragebins as desired. I have shown in the present-embodiment of my invention a bucket conveyor 23, for this purpose, the lower end of such-conveyor being located adjacent the bottom of hopper 22 and the upper end thereof extending above the floor line of the foundry. There maybe also rovided in connection with the above apparatus for sen veyingthe sand from the place of molding to the opening 11 in the floor, such means being herein indicated by an endless conveyor belt 25. I

In Fig. 2, I have shown a slight modification of my apparatus, which comprises the use of an enlarged hopper mounted beneath an opening 31 in the floor 32. This hopper 30 may be used as a storage bin for theused sand and is provided with an enlarged outlet 36 at the lower end. A screen v37 islocated across the opening 31 which serves 'for the purpose of removing the coarse objects fromthe sand, similar to the screen 13. The cutting cylinder 15 in th s case is mounted at one side of the hopper andan endless conveyor belt 38, mounted directly beneath said cylinder and the outlet 36 of hopper 80, is employed to carry the sand from the hopper to the cutting cylinder which then operates in the manner described above. An enclosed casing or compartment 40 .is provided adjacent the other side of .the cutting cylinder, which is adapted to confine the cutsand as it is thrown from the cylinderi15. The conveyor belt 38 is extended beyond the cutting cylinder under the foregoing that I have accomplished the objects primarily stated and that I have provided a very simply constructed apparatus for use in cutting and treating sand,

which may be conveniently mounted beneath the flooring of a foundry. The present apparatus is very easy to operate and doesnot take up valuable floor space. It is also so constructed thatit may be readily adapted for a continuous sand cutting and conveying system.

Other modes of applying the principle of vmy invention may be employed instead of the one explained, change being made as re gards the mechanism herein disclosed, provided the means statedby any of the following claims or theequivalent of such stated means be employed.

I" therefore particularly point out and distinctly claim as my invcntion:

1. A sand cutting apparatus including in combination a hopper having convergent walls, a sand cutting cylinder mounted at the outlet of said hopper, a casing enclosing the discharge side of said cylinder, and means for conveying the cut sand from said casing. Y A

2. A sand cutting apparatus including in combination a hopper, a sand cutting cylinder mounted adjacent the lower end of said hopper, means for conveying the sand'trom said hopper to said cylinder, a casing enclosing the discharge side o'f'the cylinder, and means for conveying the cut sand from said casing. w

3. The combination of a foundry floor having an opening therein, a screen covering said opening, a hopper mounted beneath said floor and said screen, a' sand cutting cylinder mounted adjacent the lower end of said hopper, means for conveying the sand fromthe hopper to the cylinder, a casing enclosing the discharge side of said cylinder, and means for conveying the cut sand from said casing above the level of said floor.

4. A sand cutting apparatus including in combination a vertical hopper having an opening at its lower end, a sand cutting cylinder mounted across'said opening, a casing.

enclosing the discharge side of said cylinder,

said'casing being open at itslowerend and having conveyor means mounted adjacent said casing opening. J v f 5. A sand cutting apparatus including in combination two relatively arranged chambers having a connecting passage, one of said chambersbeing open at the top and the other at the bottom thereof for the reception cutting cylinder mounted in said connecting passage. a

6. A sand cutting apparatus including in combination a sand cutting cylinder, means for supplying sand to said cylinder, and an enclosing casing mounted at the discharge side of said cylinder, the wall of said casing opposite the cylinderextending below the line of discharge therefrom.

HOWARD L. WADSWORTH.

and discharge of materia'hfand a sand P Signed by me,,this 7th day of August, I a 

